A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: product/detail.php

Line Number: 105

Backtrace:

File: /mnt/qiyezhan/hoaway/application/client/views/product/detail.php
Line: 105
Function: _error_handler

File: /mnt/qiyezhan/hoaway/application/client/controllers/Product.php
Line: 122
Function: view

File: /mnt/qiyezhan/hoaway/index.php
Line: 316
Function: require_once